encore.dev

import { api, Cache, StringKeyspace } from 'encore.dev'; // Define a type for user data that will be cached interface UserData { id: string; name: string; email: string; } // Declare a type-safe cache keyspace for user data const userCache = Cache.declare( 'user_data', StringKeyspace<UserData>() // Keys are strings, values are UserData objects ); // Define an Encore service named 'UserService' // This service exposes a GET /user/:id API endpoint export const user = api( { name: 'UserService', endpoint: 'user', path: '/user/:id', method: 'GET', }, async (id: string): Promise<UserData> => { // Try to retrieve user data from the cache first const cachedUser = await userCache.get(id); if (cachedUser) { console.log(`[Encore] User ${id} found in cache.`); return cachedUser; } // If not in cache, simulate fetching from a 'database' console.log(`[Encore] Fetching user ${id} from database...`); await new Promise(resolve => setTimeout(resolve, 200)); // Simulate async DB call const userData: UserData = { id: id, name: `User ${id} Name`, email: `user${id}@example.com` }; // Store the fetched data in the cache for 5 minutes (300 seconds) await userCache.put(id, userData, { ttl: 300 }); return userData; } ); // To run this, save as user.ts in an Encore application directory // and execute 'encore run'. The API endpoint will be exposed automatically.